trap·​e·​zoid | \ ˈtra-pə-ˌzȯid How to pronounce trapezoid (audio) \

Definition of trapezoid

1a : a quadrilateral having only two sides parallel
b British : trapezium sense 1a
2 : a bone in the wrist at the base of the metacarpal of the index finger

Illustration of trapezoid

Illustration of trapezoid

trapezoid 1a

Keep scrolling for more

Other Words from trapezoid

trapezoidal \ ˌtra-​pə-​ˈzȯi-​dᵊl How to pronounce trapezoidal (audio) \ adjective

Examples of trapezoid in a Sentence

Recent Examples on the Web

He was placed on the injured list with a right trapezoid strain Aug. 13. Los Angeles Times, "Gavin Lux will make his Dodgers debut Monday," 1 Sep. 2019 If that’s true, there’s little reason not to junk the left side of the trapezoid and do what the LIFT+ Act does: include everyone, regardless of earned income. Dylan Matthews, Vox, "Rashida Tlaib wants to give low-income adults $3,000 a year each, no questions asked," 12 June 2019 The credit looks a bit like a trapezoid: an upward-sloping line on the left, a plateau in the middle, and then a downward-sloping line on the right. Dylan Matthews, Vox, "Parenting can be a full-time job. Activists want the tax code to treat it that way.," 15 July 2019 From an angle, a square looks like a trapezoid, so Vector can just translate that skewed shape into a position. Dieter Bohn, The Verge, "The new Anki Vector robot is smart enough to just hang out," 8 Aug. 2018 To the north, where the facade meets Milan’s skyline and becomes mostly glass, cantilevering over the street, the block breaks into a zigzag of shifting floor plates, rectangles and trapezoids, the whole building wedged onto a triangular plot. Michael Kimmelman, New York Times, "Shape-Shifting Art Tower Completes Prada’s City Within a City," 15 June 2018 The piece is the anchor for Butterfly Park, a trapezoid of grass and flowers created by neighborhood residents with the support of the Milwaukee Christian Center, which also commissioned Tia's new mural. Crocker Stephenson, Milwaukee Journal Sentinel, "Better Angels: Tia Richardson's newest mural is one neighborhood's vision of better things to come," 5 July 2018 The Montreal native was the last real standup goaltender as the position moved almost exclusively to the butterfly technique, and his puck-handling prowess led the NHL to institute the trapezoid behind the net as a way to increase scoring. Stephen Whyno,, "Gary Bettman, Martin Brodeur, Willie O'Ree top Hockey Hall of Fame class," 26 June 2018 Some of them are straight lines, some are spirals and rectangles and trapezoids, and some are animals: whales, ducks, hummingbirds. Angela Chen, The Verge, "Today’s Google Doodle celebrates the scientist who studied the mysterious desert lines of Peru," 15 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trapezoid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of trapezoid

circa 1706, in the meaning defined at sense 1b

History and Etymology for trapezoid

New Latin trapezoïdes, from Greek trapezoeidēs trapezium-shaped, from trapeza table

Keep scrolling for more

Learn More about trapezoid

Statistics for trapezoid

Last Updated

8 Sep 2019

Look-up Popularity

Time Traveler for trapezoid

The first known use of trapezoid was circa 1706

See more words from the same year

Keep scrolling for more

More Definitions for trapezoid



English Language Learners Definition of trapezoid

US : a four-sided shape that has two sides that are parallel and two sides that are not parallel


trap·​e·​zoid | \ ˈtra-pə-ˌzȯid How to pronounce trapezoid (audio) \

Kids Definition of trapezoid

: a flat geometric figure with four sides but with only two sides parallel


trap·​e·​zoid | \ ˈtrap-ə-ˌzȯid How to pronounce trapezoid (audio) \

Medical Definition of trapezoid

: a bone in the distal row of the carpus at the base of the index finger

called also lesser multangular, trapezoid bone, trapezoideum

Keep scrolling for more

More from Merriam-Webster on trapezoid

Rhyming Dictionary: Words that rhyme with trapezoid

Spanish Central: Translation of trapezoid

Nglish: Translation of trapezoid for Spanish Speakers

Britannica English: Translation of trapezoid for Arabic Speakers

Comments on trapezoid

What made you want to look up trapezoid? Please tell us where you read or heard it (including the quote, if possible).


formidable, illustrious, or eminent

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!